High 7.5Published May 25, 2026

CVE-2026-47071Uncontrolled Resource Consumption vulnerability in benoitc hackney allows Flooding.

Updated under an hour ago (2026-10-19 09:40 UTC)

Does this affect you?

It affects benoitc hackney. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for benoitc hackney

Exploited in the last 30 days

Uncontrolled Resource Consumption vulnerability in benoitc hackney allows Flooding. The SOCKS5 transport in src/hackney_socks5.erl correctly applies the caller-supplied timeout to the SOCKS5 negotiation phase, but then upgrades the connection to TLS using the two-argument form ssl:connect/2, which defaults to an infinite timeout. The Timeout value is in scope at the call site but is not forwarded. A hostile SOCKS5 proxy that completes the SOCKS5 handshake normally and then goes silent (or sends a partial TLS ServerHello and stalls) will cause the connecting process to block indefinitely, regardless of the connect_timeout or recv_timeout options supplied by the caller. This issue affects hackney: from 0.10.0 before 4.0.1.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jul 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

benoitc hackney benoitc:hackney	from 0.10.0 before 4.0.1	NVD

References

https://cna.erlef.org/cves/CVE-2026-47071.htmlpatch, third-party-advisory
https://github.com/benoitc/hackney/commit/5ccdab725c561a6f03d05a51f2d0664f98236daepatch
https://github.com/benoitc/hackney/security/advisories/GHSA-gp9c-pm5m-5cxrexploit, patch, vendor-advisory
https://osv.dev/vulnerability/EEF-CVE-2026-47071patch, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.